I own and run a website, in the category of special-interest news stories, that's making 10–15k a month consistently for almost 10 years. (Yeah, we got started early, which is probably why I have good search engine rankings.) Google AdSense is the only means of income. We get close to 1 million unique visitors a month. Just me and one other part-time employee running it, so it's been a pretty spectacular (and unexpected! It started as a hobby) success.
